Nobody wants to pay more than they have to for what they buy, and with all the deal-finding tools out there, there's no reason you should have to. From barcode-scanning apps to browser extensions that automatically seek out lower prices and coupon codes, here are a some of our favorites.

I may be an outlier, but I've decided to unsubscribe from nearly all my group-buying deals. Instead, I'm focusing on Yipit, an aggregation service that makes group buying more like shopping for groceries than waiting for that impulse offer to land in your in-box.